I take a drop a few days a week... that is it ! and it has helped me retain my body heat in the winter. I like it that I don't have to keep the heater on all day just from taking a drop of this with my tea in the morning. I might even start taking it daily... I just didn't want to overdo it at first. A little goes a long way. I've even convinced my husband to take a drop on the very cold mornings and it seems to make him happier about winter :-)

I've only been taking this for a month so far, at a dose of 2 drops per day, so it's a bit too soon to say how effective it is. Next month I'll double the dose to 4 drops, and the following month again to 8 drops (1 milligram). No negative effects so far, hopefully taking the 8 drops will be tolerable and I'll be able to give a better review then. One bottle looks like it'll last a very long time.